Have someone being watching the GCN* advertising show again ?
Oval rings come and go regularly and a very few people stick with them. If they were noticeably better for many cyclists then you'd see them everywhere, I know a lot of cyclists from fat pootlers to race snakes and only one has tried and stuck with them and he's a triathlete and reckons it helps with the post bike running.
But hey its a Christmas pressie which is the ideal time for frivolities
* aka the You Pay, We Say show